Actually the website customer did send the funds for the website though the game started when i tried to withdraw the funds.
I am more curious how you found this website. Would you mind sharing how you found this website? How do you know that your customer does not own this scam exchange? I am fairly certain that your so-called customer owns the website where he sent the funds and asked you to withdraw them. Once you have tried to withdraw your funds, the game has started.
Whatever has happened, please tell us how you found the website so we can understand the case better.
Thanks for your question though i did not find that website, i have advertised an ecommerce for sale in order to collect the money for charity, the customer approached me and after we negotiate the price, customer told me that all his funds are in that site and sent me screenshots to confirm that.
I was asked to register an account at GENERCRYPTO.com and customers sent the funds, once i tried to withdraw the funds, on every withdraw attempt a poupup pops up with firstly, deposit 0.005 btc in order to confirm external wallet (at Poloniex.com), then a second time ive tried to withdraw there is a popup of 0.01btc, membership activation. third time was another 0.015 for insurance, since they detected my ip came from Israel and they have decided that Israel is a risk country while insisting that israelis in a list of risk countries which is not true, and here i am stuck with about 4.8K worth of BTC in their wallet.